Chapter 7 Plate Tectonics

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Across
  1. 3. Rising mantle material at mid-ocean ridges creates the potential for plates to move away from the ridge with a force.
  2. 4. the magnetic field reverses direction
  3. 5. the denser the plate sinks below the more buoyant plate in a process.
  4. 8. as a slab sinks it pulls on the rest f the plate with a force.
  5. 11. Earth's surface is made out of rigid slabs of rock, or plates, that move with respect to eachother.
  6. 13. suggested that continents are in constant motion.
  7. 14. The cold rigid outermost rock layer.
  8. 15. all the continents were once part of a supercontinent.
  9. 16. forms where two places separate.
Down
  1. 1. Mountain ranges in the middle of the ocean.
  2. 2. forms where two plates slide past each other.
  3. 6. A state in which magnetized objects such as a compass needle will orientate themselves to point north.
  4. 7. the circulation of material caused by differences in temperature and density.
  5. 9. forms where two plates collide.
  6. 10. a state in which magnetized objects would reverse direction and orientate themselves to point south.
  7. 12. Process by which new oceanic crust forms along the mid-ocean ridge and old oceanic crust moves away.